JP5378235B2 - 耐苛性膜 - Google Patents
耐苛性膜 Download PDFInfo
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- JP5378235B2 JP5378235B2 JP2009550090A JP2009550090A JP5378235B2 JP 5378235 B2 JP5378235 B2 JP 5378235B2 JP 2009550090 A JP2009550090 A JP 2009550090A JP 2009550090 A JP2009550090 A JP 2009550090A JP 5378235 B2 JP5378235 B2 JP 5378235B2
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- acrylic polymer
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
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- DMUPYMORYHFFCT-UPHRSURJSA-N (z)-1,2,3,3,3-pentafluoroprop-1-ene Chemical compound F\C=C(/F)C(F)(F)F DMUPYMORYHFFCT-UPHRSURJSA-N 0.000 description 1
- BLTXWCKMNMYXEA-UHFFFAOYSA-N 1,1,2-trifluoro-2-(trifluoromethoxy)ethene Chemical compound FC(F)=C(F)OC(F)(F)F BLTXWCKMNMYXEA-UHFFFAOYSA-N 0.000 description 1
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- WUMVZXWBOFOYAW-UHFFFAOYSA-N 1,2,3,3,4,4,4-heptafluoro-1-(1,2,3,3,4,4,4-heptafluorobut-1-enoxy)but-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)=C(F)OC(F)=C(F)C(F)(F)C(F)(F)F WUMVZXWBOFOYAW-UHFFFAOYSA-N 0.000 description 1
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- YKWORVRLPTZONH-UHFFFAOYSA-N 1-ethenoxy-1,1,2,3,3,3-hexafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)propane Chemical compound FC(F)(F)C(F)(F)C(F)(F)OC(F)(C(F)(F)F)C(F)(F)OC=C YKWORVRLPTZONH-UHFFFAOYSA-N 0.000 description 1
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- YSYRISKCBOPJRG-UHFFFAOYSA-N 4,5-difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole Chemical compound FC1=C(F)OC(C(F)(F)F)(C(F)(F)F)O1 YSYRISKCBOPJRG-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/16—Homopolymers or copolymers or vinylidene fluoride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/40—Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
- B01D71/401—Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate
- B01D71/4011—Polymethylmethacrylate
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- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
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Description
a)50〜99重量パーセントの少なくとも1つのポリフッ化ビニリデン(PVDF)ポリマーまたはコポリマーと、
b)1〜50重量パーセントの少なくとも1つのアクリルポリマーと
を含む均質なポリマーブレンドを含む耐苛性膜に関する。
膜ドープを、清浄なガラス板に注ぎ、ドローダウンスクエア(drawn−down square)によりドローダウンした。湿潤フィルム厚さは5ミル〜20ミルであった。湿潤フィルムを、高湿(65℃の水浴より上の周囲蒸気)に30秒〜2分間曝露した。湿度曝露後、ガラス板を温水浴に浸して、転相を完了し、膜を硬化した。膜形成が即時になされ、形成された膜は、自然にガラス板から持ち上がった。
膜片(約20mm×50mm)を切断し、瓶に入れた。10重量パーセントの水酸化ナトリウムの水溶液を各瓶に加えた。瓶のキャップを締め、振とうして(攪拌でなく)周囲温度で静置した。試料を数日毎に目視でチェックした。2週間後、膜を取り出し、脱イオン水で濯ぎ、次にイソプロパノールに短く浸し、空気乾燥させた。乾燥した膜試料を、Hunter Labscan XE色度計で色の変化を分析した。
Claims (15)
- a)50〜99重量パーセントの少なくとも1つのポリフッ化ビニリデン(PVDF)ポリマーまたはコポリマーと、
b)1〜50重量パーセントの少なくとも1つのアクリルポリマーと
で構成され、
前記アクリルポリマーが、ポリメチルメタクリレートのホモポリマー、または、70〜99重量パーセントのメチルメタクリレートモノマー単位と、1〜30重量パーセントの1つ以上のC 1〜4 アルキルアクリレートと、0〜10重量パーセントの(メタ)アクリル酸とを合計で100重量パーセント含むコポリマーであり、
0.01〜10ミクロンの細孔径を有する、均質なポリマーブレンドを含む耐苛性膜。 - 前記ポリマーブレンドが、
c)75〜90重量パーセントの少なくとも1つのポリフッ化ビニリデンポリマーと、
d)10〜25重量パーセントの少なくとも1つのアクリルポリマーと
を含む請求項1に記載の膜。 - 前記PVDFポリマーが、85〜95モルパーセントのポリフッ化ビニリデンと5〜15モルパーセントのヘキサフルオロプロピレンとのコポリマーを含む請求項1に記載の膜。
- 前記PVDFポリマーの分子量が、100,000〜5,000,000g/モルである請求項1に記載の膜。
- 前記アクリルポリマーが、60〜99重量パーセントのメチルメタクリレート単位、1〜20重量パーセントの1つ以上のC1〜4アルキル(メタ)アクリレートおよび/または1〜20重量パーセントのC1〜4(メタ)アルキル−アクリル酸を有するコポリマーを含む請求項1に記載の膜。
- 前記アクリルポリマーの分子量が、30,000〜500,000g/モルである請求項1に記載の膜。
- 前記アクリルポリマーが、アクリルブロックコポリマーを含む請求項1に記載の膜。
- 前記アクリルブロックコポリマーが、ポリブチルアクリレートセンターブロックおよびメチルメタクリレートまたはメチルメタクリレートコポリマーをエンドブロックとして有するトリブロックコポリマーである請求項7に記載の膜。
- PVDFおよびアクリルポリマー樹脂が、適切な比率で、ペレット化形態へと溶融押出しすることにより、予備ブレンドされてから、次に前記成膜に用いられる請求項1に記載の膜。
- PVDFおよびアクリルポリマー樹脂が、適切な比率で、ペレット化形態へと溶融押出しすることにより、予備ブレンドされてから、粉末形態へと粉砕され、これを次に前記成膜に用いる請求項1に記載の膜。
- PVDFおよびアクリルポリマー樹脂が、別個の粉末として予備ブレンドされて、前記膜処方に用いるのに適切な比率で、均一なコンシステンシーの粉末ブレンドとなる請求項1に記載の膜。
- 1つ以上の添加剤をさらに含み、前記PVDFおよびアクリルポリマー樹脂は、適切な比率で、ペレット化形態へと溶融押出しすることにより、前記添加剤と共に予備ブレンドされてから、次に前記成膜に用いられる請求項1に記載の膜。
- 前記添加剤が、ポリアルキレングリコール、ポリ−ビニルピロリドン、金属塩およびその他水抽出可能な細孔形成剤からなる群から選択される請求項12に記載の膜。
- 前記膜が、中空糸膜、支持された中空糸膜、平坦な支持されていない膜または平坦な支持された膜である請求項1に記載の膜。
- 浄水、体液浄化、廃水処理、浸透蒸留およびプロセス流体ろ過のための物品を含む請求項1に記載の膜。
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